mail server... exim and qpopper

["Mike Egglestone" <Mike_Egglestone@fc.schdist57.bc.ca>]

Hi.,..
I'm having some problems setting up my email pop server...
I have installed qpopper....

I don't have a valid domain...
I figured I could use email addresses with IP addresses instead of
domains for now....ex   mike@12.34.56.78 (where mike is a user on my
localhost)
Anyway.,..
Can anyone point me where I can find some explanations on how to set
this up?
It seems I can send mail to myself (my local mail server)  from any web
based email account...
ex....billsucks@hotmail.com     to mike@12.34.56.78  is working fine...
but visa versa does not....
ipchains are set to wide open.....

If you know of a great source to learn this... please let me know  :)
I figure that exim is where I'm having the probs...
Any pointers would be great!!

Thanks
Mike